I have been thinking the same about my 1972 K10. The best info comes from the build threads in my opinion. Search for 4x4 LS swap or 4x4 5.3. Here are a few that I have gained a ton of info from.
Creamsicle
http://67-72chevytrucks.com/vboard/s...d.php?t=782232
Crash's 69 K10
http://67-72chevytrucks.com/vboard/s...d.php?t=494599
And a 2wd here that he keeps to a very small budget Rusty C10
https://ls1tech.com/forums/conversio...71-c-10-a.html
One more 2wd but you get some great info and video from his build thread.
https://www.youtube.com/c/RustyWrenches/playlists
Here's a Jimmy 4x4 with NP205 build
http://67-72chevytrucks.com/vboard/s...d.php?t=663780
And Another 4x4 Jimmy
http://67-72chevytrucks.com/vboard/s...d.php?t=661982